CN109905248A - Ethernet power supply unit - Google Patents
Ethernet power supply unit Download PDFInfo
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- CN109905248A CN109905248A CN201811036676.0A CN201811036676A CN109905248A CN 109905248 A CN109905248 A CN 109905248A CN 201811036676 A CN201811036676 A CN 201811036676A CN 109905248 A CN109905248 A CN 109905248A
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims description 45
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 102100024209 CD177 antigen Human genes 0.000 description 14
- 101000980845 Homo sapiens CD177 antigen Proteins 0.000 description 14
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 description 10
- 230000005611 electricity Effects 0.000 description 4
- 101100084474 Gallus gallus PRRX1 gene Proteins 0.000 description 3
- 101000942118 Homo sapiens C-reactive protein Proteins 0.000 description 3
- 101000920800 Homo sapiens Endoplasmic reticulum-Golgi intermediate compartment protein 2 Proteins 0.000 description 3
- 101001069723 Homo sapiens Paired mesoderm homeobox protein 2 Proteins 0.000 description 3
- 101001090065 Homo sapiens Peroxiredoxin-2 Proteins 0.000 description 3
- 101000583156 Homo sapiens Pituitary homeobox 1 Proteins 0.000 description 3
- 101001092910 Homo sapiens Serum amyloid P-component Proteins 0.000 description 3
- 101150081137 PRX1 gene Proteins 0.000 description 3
- 102100033829 Paired mesoderm homeobox protein 2 Human genes 0.000 description 3
- KJWMGLBVDNMNQW-VWTMXFPPSA-N Pectenotoxin 1 Chemical compound O[C@@H]1[C@H](C)CCO[C@]1(O)[C@H]1O[C@@H]2/C=C/C(/C)=C/[C@H](C)C[C@](C)(O3)CC[C@@H]3[C@](O3)(O4)CC[C@@]3(CO)C[C@@H]4[C@@H](O3)C(=O)C[C@]3(C)[C@@H](O)[C@@H](O3)CC[C@@]3(O3)CCC[C@H]3[C@@H](C)C(=O)O[C@@H]2C1 KJWMGLBVDNMNQW-VWTMXFPPSA-N 0.000 description 3
- 102100030345 Pituitary homeobox 1 Human genes 0.000 description 3
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 description 3
- 102100036202 Serum amyloid P-component Human genes 0.000 description 3
- 101100194320 Zea mays PER1 gene Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 101100321817 Human parvovirus B19 (strain HV) 7.5K gene Proteins 0.000 description 1
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- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Small-Scale Networks (AREA)
- Power Sources (AREA)
- Dc Digital Transmission (AREA)
Abstract
The present invention proposes a kind of Ethernet power supply unit.Ethernet power supply unit includes the first Ethernet connector, ether transformer circuit and detection circuit.First Ethernet connector is coupled to the second Ethernet connector of network equipment by ether cable, and has the first spare pin and the second spare pin.Ether transformer circuit couples the first Ethernet connector, to provide supply voltage to ether cable, to transmit supply voltage to network equipment.Detection circuit receives supply voltage, and couple ether transformer circuit, the first spare pin and the second spare pin, identification voltage is received to provide reference voltage to the first spare pin, and from the second spare pin, to differentiate whether network equipment is power receiving device.
Description
Technical field
The present invention relates to a kind of power supply units, and in particular to a kind of Ethernet power supply unit.
Background technique
Ethernet power supply (Power over Ethernet, POE) device is one and supplies answering for power supply by grid line
With explicitly defining its specification in IEEE 802.3AT/F and use, and its convenience is also as well known, such as can save
The space exterior I/O, allow product appearance can it is more beautiful with it is practical.But in Ethernet power supply unit using upper, because
To need to detect whether external device (ED) is Ethernet power supply unit, so the route and integrated circuit (IC) of large area are needed,
And the route of large area and integrated circuit is expensive and not easy to place in portable network devices, so that portable
Network equipment is not available the application of Ethernet power supply.Therefore, Ethernet power supply unit needs a kind of new circuit design
To be suitable for portable network devices.
Summary of the invention
The present invention provides a kind of Ethernet power supply unit, can carry out whether judging network equipment by simple circuit
For power receiving device.
Ethernet power supply unit of the invention, including the first Ethernet connector, ether transformer circuit and detection
Circuit.First Ethernet connector is coupled to the second Ethernet connector of network equipment by ether cable, and has the
One spare pin, transmission pin set, receives pin set at the second spare pin.Ether transformer circuit couples the first Ethernet
Connector, to provide supply voltage to ether cable, to transmit supply voltage to net by transmission pin set and reception pin set
Network device.Detection circuit receives supply voltage, and couples ether transformer circuit, the first spare pin and second spare draw
Foot, detection circuit receives identification voltage to provide reference voltage to the first spare pin, and from the second spare pin, to sentence
Whether other network equipment is power receiving device.When network equipment is power receiving device, detection circuit provides supply voltage to ether and becomes
Transformer circuits.
Based on above-mentioned, the Ethernet power supply unit of the embodiment of the present invention, reference voltage is transmitted to the first spare pin, and
And foundation differentiates whether network equipment is power receiving device from the second received identification voltage of spare pin institute.Therefore, Ethernet
Network power supply unit can simplify the mode of judgement, that is, be judged with simple circuit.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to cooperate attached drawing to make
Carefully it is described as follows.
Detailed description of the invention
Fig. 1 is the system schematic of Ethernet power supply unit according to an embodiment of the present invention；
Fig. 2A is the system schematic of Ethernet power supply unit coupling power receiving device according to an embodiment of the present invention；
Fig. 2 B is that the detection circuit of Ethernet power supply unit according to an embodiment of the present invention couples the equivalent of power receiving device
Schematic diagram；
Fig. 3 A is the system schematic of Ethernet power supply unit coupled scheme according to an embodiment of the present invention；
Fig. 3 B is the equivalent of the detection circuit coupled scheme device of Ethernet power supply unit according to an embodiment of the present invention
Schematic diagram；
Fig. 4 A is the system schematic of Ethernet power supply unit coupled scheme according to an embodiment of the present invention；
Fig. 4 B is the equivalent of the detection circuit coupled scheme device of Ethernet power supply unit according to an embodiment of the present invention
Schematic diagram.
Specific embodiment
In order to make the description of the present invention more exhaustive and complete, attached drawing and various embodiments as described below, attached drawing be can refer to
In identical number represent the same or similar component.On the other hand, well-known component and step are not described in embodiment
In, unnecessary limitation is caused to avoid to the present invention.
Fig. 1 is the system schematic of Ethernet power supply unit according to an embodiment of the present invention.Fig. 1 is please referred to, in this reality
It applies in example, Ethernet power supply unit 100 is coupled to network equipment 10, and Ethernet power supply unit by ether cable 20
100 include the first Ethernet connector 110, ether transformer circuit 120 and detection circuit 130.First Ethernet connector 110
The second Ethernet connector 11 of network equipment 10 is coupled to by ether cable 20.First Ethernet connector 110 has the
One spare pin PRV1, the second spare pin PRV2, transmission pin set are (for example including the first transmission pin PTX1 and the second transmission
Pin PTX2) and receive pin set (receive pin PRX1 and second for example including first and receive pin PRX2).
Ether transformer circuit 120 couples the first Ethernet connector 110, to pass through the first transmission pin PTX1, the
Two transmission pin PTX2, first, which receive pin PRX1 and second and receive pin PRX2, provides supply voltage VPD to ether cable 20,
To transmit supply voltage VPD to network equipment 10.Detection circuit 130 receives supply voltage VPD, and couples ether transformer electricity
Road 120, the first spare spare pin PRV2 of pin PRV1 and second, to provide the spare pin of reference voltage VREF to first
PRV1, and identification voltage VID is received from the second spare pin PRV2, to differentiate whether network equipment 10 is power receiving device.
When network equipment 10 is power receiving device, then detection circuit 130 provides supply voltage VPD to ether transformer circuit
120, supply voltage VPD is sent to by power receiving device by ether transformer circuit 120 and ether cable 20.When network equipment 10
When not being power receiving device, then detection circuit 130 does not provide supply voltage VPD to ether transformer circuit 120, that is, supply voltage
VPD will not be sent to network equipment 10.
Furthermore, it is understood that the first spare pin PRV1 can pass through ether cable 20 when network equipment 10 is power receiving device
And second Ethernet connector 11 be coupled to the second spare pin PRV2, that is, identify that voltage VID can be identical to reference voltage
VREF.In other words, when network equipment 10 is power receiving device, reference voltage VREF can pass back to detection circuit 130, to trigger inspection
Supply voltage VPD is provided to ether transformer circuit 120 by slowdown monitoring circuit 130.
Ether transformer circuit 120 includes the first transformer TM1 and the second transformer TM2, transformer TM3 and TM4.First
There is transformer TM1 the first side F1 and third side F3, the second transformer TM2 to have second side F2 and the 4th side F4.First side F1
First end coupling first transmission pin PTX1, the first intermediate ends of the first side F1 are to receive supply voltage VPD, and first
Second end coupling the second transmission pin PTX2 of side F1, wherein capacitor CM1, electricity of the first intermediate ends of the first side F1 by concatenation
Resistance RM1 and capacitor CX1 is coupled to ground terminal GND2.The third end coupling first of second side F2 receives pin PRX1, second side F2
The second intermediate ends couple ground voltage GND1, and the 4th end coupling second of second side F2 receives pin PRX2, wherein the
The second intermediate ends of two side F2 are coupled to ground terminal GND2 by capacitor CM2, resistance RM2 and the capacitor CX1 concatenated, and receive
Voltage GND1 is different from receiving voltage GND2.
The 5th end of third side F3 receives the first transmission signal TX1, the third of third side F3 by the side of transformer TM3
Intermediate ends receive transmission reference voltage TXC, and the 6th end of third side F3 receives second by the other side of transformer TM3 and passes
The number of delivering letters TX2.The 7th end of 4th side F4 provides first by the side of transformer TM4 and receives signal RX1, and the 4th of the 4th side the
Intermediate ends coupling receives reference voltage TXC, and the 8th end of the 4th side provides second by the other side of transformer TM4 and receives
Signal RX2.
Detection circuit 130 includes that device differentiates circuit 131 and voltage transmitting circuit 133.Device differentiates the coupling of circuit 131 the
The one spare spare pin PRV2 of pin PRV1 and second, to provide the spare pin PRV1 of reference voltage VREF to first, and
Identification voltage VID is received from the second spare pin PRV2, to differentiate whether network equipment 10 is power receiving device.When network equipment 10
When for power receiving device, enable transmission control signal STC；When network equipment 10 is not power receiving device, forbidden energy transmission control signal
STC。
Voltage transmitting circuit 133 receives supply voltage VPD and coupling device differentiates circuit 131 and ether transformer circuit
120.When transmission controls signal STC enable, transmission supply voltage VPD to ether transformer circuit 120；When transmission controls signal
When STC forbidden energy, stop transmission supply voltage VPD to ether transformer circuit 120.
Furthermore, it is understood that device differentiates that circuit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4, first capacitor C1 and the first junction transistor T1.First resistor R1 is coupled to the spare pin of supply voltage VPD and first
Between PRV1.First junction transistor T1 has the collector for providing transmission control signal STC, base stage and coupling ground voltage
The emitter of GND1.Second resistance R2 is coupled between the base stage of the first junction transistor T1 and the second spare pin PRV2.The
Three resistance R3 are coupled between the second spare pin PRV2 and ground voltage GND1.First capacitor C1 is coupled to the second spare pin
Between PRV2 and ground voltage GND1.4th resistance R4 is coupled to the collector of supply voltage VPD and the first junction transistor T1
Between.Voltage transmitting circuit 133 includes PMOS transistor MP1.PMOS transistor MP1 have receive supply voltage VPD source electrode,
It receives the grid of transmission control signal STC and couples the drain electrode of ether transformer circuit 120.
In the design of small signal circuit, since the requirement of driving capability is lower, that is, current value about number milli~hundreds of
Milliampere, therefore the resistance value of resistance can generally be designed K ohm several, that is, first resistor R1, second resistance R2,3rd resistor R3 and
The resistance value of 4th resistance R4 would generally be designed as K ohm several.In one embodiment, first resistor R1 is 7.5K ohm, the second electricity
Hindering R2 is 2.49K ohm, and 3rd resistor R3 is 4.7K ohm, and the 4th resistance R4 is 1K ohm.
Fig. 2A is the system schematic of Ethernet power supply unit coupling power receiving device according to an embodiment of the present invention.Fig. 2 B
The equivalent schematic of power receiving device is coupled for the detection circuit of Ethernet power supply unit according to an embodiment of the present invention.It please refers to
Fig. 1, Fig. 2A and Fig. 2 B, in the present embodiment, network equipment 10a are power receiving device, and the second Ethernet connector 11a is substantially
It is identical to the first Ethernet connector 110, but the first spare pin PRV1 of the second Ethernet connector 11a is coupled to second
Spare pin PRV2, and the second Ethernet connector 11a is coupled to ether transformer circuit 13a.At this point, due to the second ether
The spare pin PRV2 of the spare pin PRV1 and second of the first of network joint 11a is that is respectively coupled to by ether cable 20
The spare pin PRV2 of the spare pin PRV1 and second of the first of one Ethernet connector 110, therefore the first Ethernet connector 110
The first spare pin PRV1 can be coupled to the second spare pin PRV2.
Then, supply voltage VPD can be divided through first resistor R1, second resistance R2 and 3rd resistor R3 and base stage is provided to
The base stage of first junction transistor T1, the first junction transistor T1 is connected.Since emitter current has dragged down transmission control signal
The voltage level of STC causes the voltage level of transmission control signal STC can be close to ground voltage GND1, that is, the transmission of enable
Control signal STC.Also, the transmission control signal STC of enable leads to the conducting of PMOS transistor MP1, and supply voltage VPD meeting
Ether transformer circuit 120 is sent to by the PMOS transistor MP1 of conducting.
Fig. 3 A is the system schematic of Ethernet power supply unit coupled scheme according to an embodiment of the present invention.Fig. 3 B be according to
According to the equivalent schematic of the detection circuit coupled scheme device of the Ethernet power supply unit of the embodiment of the present invention.Please refer to Fig. 1,
Fig. 3 A and Fig. 3 B, in the present embodiment, network equipment 10 are with the circuit structure of 75 ohm (OHM) docking, that is, network equipment
Multiple intermediate ends of the side of multiple voltage devices in 10 ether transformer circuit 13b pass through resistance Rx respectively and are mutually coupled,
And multiple intermediate ends of the side of multiple voltage devices in ether transformer circuit 13b are respectively coupled to power end TPD, ground connection electricity
Press GND1, the first spare spare pin PRV2 of pin PRV1 and second.
At this point, since first resistor R1 and two resistance Rx are serially connected between supply voltage VPD and ground voltage GND1, also
That is the cross-pressure of resistance Rx is lower, causes the base stage of the first junction transistor T1 too low, and then the first junction transistor T1 can not work
Make.Since supply voltage VPD is sent to the collector of the first junction transistor T1 by the 4th resistance R4, transmission control letter is improved
The voltage level of number STC causes the voltage level of transmission control signal STC can be close to supply voltage VPD, that is, the transmission of forbidden energy
Control signal STC.Also, the transmission control signal STC of forbidden energy leads to the cut-off of PMOS transistor MP1, and supply voltage VPD meeting
Ether transformer circuit 120 can not be sent to by PMOS transistor MP1, that is, Ethernet power supply unit 100 will not pass
Supply voltage VPD is sent to burn network equipment 10 to avoid electric power.
Fig. 4 A is the system schematic of Ethernet power supply unit coupled scheme according to an embodiment of the present invention.Fig. 4 B be according to
According to the equivalent schematic of the detection circuit coupled scheme device of the Ethernet power supply unit of the embodiment of the present invention.Please refer to Fig. 1,
Fig. 4 A and Fig. 4 B, in the present embodiment, network equipment 10 be with 0 ohm dock circuit structure, that is, network equipment 10 with
Multiple intermediate ends of the side of multiple voltage devices in too transformer circuit 13b are mutually coupled by conducting wire respectively, and ether
Multiple intermediate ends of the side of multiple voltage devices in transformer circuit 13b be respectively coupled to power end TPD, ground voltage GND1,
The first spare spare pin PRV2 of pin PRV1 and second.
At this point, since (that is, the first spare pin PRV1 and second is standby for the junction of first resistor R1 and second resistance R2
It is coupled between ground voltage GND1 with pin PRV2), leading to the base stage of the first junction transistor T1 is ground voltage GND1,
And then the first junction transistor T1 can not work.Since supply voltage VPD is sent to the first junction transistor by the 4th resistance R4
The collector of T1 improves the voltage level of transmission control signal STC, causes the voltage level of transmission control signal STC that can connect
Nearly supply voltage VPD, that is, the transmission of forbidden energy controls signal STC.Also, the transmission control signal STC of forbidden energy causes PMOS brilliant
The cut-off of body pipe MP1, and supply voltage VPD can not be sent to ether transformer circuit 120 by PMOS transistor MP1,
It is exactly that Ethernet power supply unit 100 will not transmit power supply and burn network equipment 10 to avoid electric power.
In conclusion the beneficial effect of the embodiment of the present invention is, Ethernet power supply unit transmits reference voltage to the
One spare pin, and foundation differentiates whether network equipment is by Denso from the second received identification voltage of spare pin institute
It sets.Therefore, Ethernet power supply unit can simplify the mode of judgement, that is, be judged with simple circuit.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any technical field
Middle technical staff without departing from the spirit and scope of the invention, can make a little variation and retouch, therefore protection model of the invention
Enclosing should regard subject to claim.
Claims (10)
1. a kind of Ethernet power supply unit characterized by comprising
First Ethernet connector, is coupled to the second Ethernet connector of network equipment by ether cable, and has the
One spare pin, the second spare pin, transmission pin set and reception pin set；
Ether transformer circuit couples the first Ethernet connector, to pass through the transmission pin set and the reception
Pin set provides supply voltage to the ether cable, to transmit the supply voltage to the network equipment；And
Detection circuit receives the supply voltage, and couples the ether transformer circuit, the first spare pin and institute
State the second spare pin, the detection circuit is to provide reference voltage to the described first spare pin, and from described second
Spare pin receives identification voltage, to differentiate whether the network equipment is power receiving device, when the network equipment be it is described by
When electric installation, the supply voltage is provided to the ether transformer circuit.
2. Ethernet power supply unit according to claim 1, which is characterized in that described in being identical to when the identification voltage
When reference voltage, differentiate that the network equipment is the power receiving device.
3. Ethernet power supply unit according to claim 2, which is characterized in that in the power receiving device, described
One spare pin is coupled to the described second spare pin by the ether cable and the second Ethernet connector.
4. Ethernet power supply unit according to claim 1, which is characterized in that when the network equipment be not it is described by
When electric installation, the supply voltage is not provided to the ether transformer circuit.
5. Ethernet power supply unit according to claim 4, which is characterized in that the detection circuit includes:
Device differentiates circuit, couples the first spare pin and the second spare pin, to be when the network equipment
When the power receiving device, enable transmission control signal transmits described in forbidden energy when the network equipment is not the power receiving device
Control signal；And
Voltage transmitting circuit, receives the supply voltage and coupling described device differentiates circuit and the ether transformer circuit,
To transmit the supply voltage to the ether transformer circuit when the transmission controls signal enable, and when described
When transmission control signal forbidden energy, stop transmitting the supply voltage to the ether transformer circuit.
6. Ethernet power supply unit according to claim 5, which is characterized in that described device differentiates that circuit includes:
First resistor is coupled between the supply voltage and the first spare pin；
First junction transistor has the collector for providing the transmission control signal, base stage and the transmitting for coupling ground voltage
Pole；
Second resistance is coupled between the base stage and the second spare pin；
3rd resistor is coupled between the described second spare pin and the ground voltage；
First capacitor is coupled between the described second spare pin and the ground voltage；And
4th resistance is coupled between the supply voltage and the collector.
7. Ethernet power supply unit according to claim 5, which is characterized in that the voltage transmitting circuit includes:
PMOS transistor has the source electrode for receiving the supply voltage, the grid for receiving the transmission control signal and coupling institute
State the drain electrode of ether transformer circuit.
8. Ethernet power supply unit according to claim 1, which is characterized in that the transmission pin set includes the first biography
Pin and the second transmission pin are sent, the reception pin set includes the first reception pin and second receives pin, and the ether becomes
Transformer circuits include:
First transformer has the first side, wherein the first end coupling of first side the first transmission pin, described first
First intermediate ends of side are to receive the supply voltage, and second end coupling second transmission of first side is drawn
Foot；And
Second transformer has second side, wherein the third end coupling of described second side the first reception pin, described second
Second intermediate ends of side couple ground voltage, and the 4th end coupling described second of described second side receives pin.
9. Ethernet power supply unit according to claim 8, which is characterized in that first transformer also has third
Side, wherein the 5th end of the third side receives the first transmission signal, the third intermediate ends of the third side receive transmission reference
Voltage, and the 6th end of the third side receives the second transmission signal.
10. Ethernet power supply unit according to claim 8, which is characterized in that second transformer also has
Four sides, wherein the 7th end of the 4th side, which provides first, receives signal, the 4th intermediate ends coupling of the 4th side receives ginseng
Voltage is examined, and the 8th end of the 4th side provides second and receives signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106143257A TWI649982B (en) | 2017-12-08 | 2017-12-08 | Ethernet power supply |
| TW106143257 | 2017-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109905248A true CN109905248A (en) | 2019-06-18 |
| CN109905248B CN109905248B (en) | 2021-06-01 |
Family
ID=66213857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811036676.0A Active CN109905248B (en) | 2017-12-08 | 2018-09-06 | Ethernet power supply device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10742428B2 (en) |
| CN (1) | CN109905248B (en) |
| TW (1) | TWI649982B (en) |
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- 2017-12-08 TW TW106143257A patent/TWI649982B/en active
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2018
- 2018-09-06 CN CN201811036676.0A patent/CN109905248B/en active Active
- 2018-10-16 US US16/162,164 patent/US10742428B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| US10742428B2 (en) | 2020-08-11 |
| US20190182057A1 (en) | 2019-06-13 |
| CN109905248B (en) | 2021-06-01 |
| TW201926944A (en) | 2019-07-01 |
| TWI649982B (en) | 2019-02-01 |
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